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include/linux/compiler-gcc.h: improve __visible documentation

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Cc: Andi Kleen <andi@firstfloor.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Andrew Morton 2015-11-06 16:30:09 -08:00 committed by Linus Torvalds
parent 54708d2858
commit 9add850c21
1 changed files with 4 additions and 1 deletions
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include/linux/compiler-gcc.h
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@ -205,7 +205,10 @@
#if GCC_VERSION >= 40600
/*
* Tell the optimizer that something else uses this function or variable.
* When used with Link Time Optimization, gcc can optimize away C functions or
* variables which are referenced only from assembly code. __visible tells the
* optimizer that something else uses this function or variable, thus preventing
* this.
*/
#define __visible __attribute__((externally_visible))
#endif